Electric switch.



L. B. ABBOTT.

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i 1,022,809. ELECTRIC SWITCH. LiNN B. Anno'rr, Bridgeport, Conn., assignor to llarvey Hubbell, Incorporated, Bridgeiort, Conn., a Corporation of Connecticut-.

Filed June QG, 1911. Serial Nc. 635,418. To all whom, z't may concern.'

Be it known that I, LiNN B. Aiiao'rr, citizen of the United States, residing att Bridgeport., county of Fairfield, State ofi Connecticut, have invented an linprovement, in Electric Switches, of which the following;` is a specification.

This invention relates to pull switches and has for its object to orovide a switch mechaiiism of simple and compact. eonstructiont and arrangement which may be operated livi, the direct downward nill of a chain whie ii enters the switch shell or casing through ai centrally arranged guide at. the bottomt thereof. These and other objects of the in-l` vention, together with means whereby theg same may be carried into efleet, will best. be understood from the following descri )tion of one form or embodiment thereof illustrated in the accompanying drawings. lt will be understood however that the iiivention is not limited tothe construetion shown and described lait may be embodied in other forms without departing from the spirit. and scope thereof as define( by the claims hereunto appended.

In said drawings: Figure 1 is a longitudinal section through the shell, the cap and chain guide being shown in elevation partly broken away Fig. 2 is a. plan view of the ahell with ti moved. Fig. 3 is a longitudinal section. on 1 a plane parallel to the plane. of section in Fig. l. of the ,switch mechanism removed from thi` shell. Fig. 4 is a longitudinal see.- Iion of said switch mechanism talten at right angles to Fig. Zi. Fig. 5 is an elevation of the body of the shell. Fig. G is a view siinila r to Fig. t with thc cap removed and vic\v ing the parts from the opposite side.. Fig'. 7 is a section on the line 7-7, Fig. 4. lig.

R is a detail view of the circuit closing meinber. Fig. tl is a detail view of the operating segment viewed from the side opposite to thatl lshown in Fig. T.

l2 denotes the body portion of the shell, 13 the. cap, and l^l the insulating lining. 'lhc body portion and cap are secured together in any suitable manner, as by ontwardly projecting lugs 15 stamped out. from the metal of the shell and which engage an inwardly turned lip (not shown) at the edge of the ca i, the flexibility of thc parts permitting the engagement and disengagement of the lugs and lip. The body 12 is provided at. its lower end` with a centrally arranged guidc 1G for the operating chain 17.

'1H and 1t) denote insulating blocks arranged longitudinally of the body 12 within the saaie, said blocks ha'ving substantially cylindrical outer faces to fit. the interior e switch mechanism re-f of the shell and substantially ilane opposed 3 and 22 having angular ends respectively attached to insulating block 18 by screws 30, 31 and 32, and to insulatingr block 19 by screws 33, 34 and 35. The insulator formed by the blocks 18 and 19 provides therefore, intermediate Iis'aid blocks a chamber for the switch mechanism whici is arranged ceii trally with respect to the shell, extends longitudinally thereof, and communicates at its lower ent with the chain guide 16. For positioniwr the insulator in the shell and for holding t ie sinne stationary therein, the body ineinher 1Q is provided with inwardly projecting lips Q4, preferably pressed out of the metal of the, shell and engaging the inner faces of the blocks 1S and 1t) respectively.

Q5 denotes a binding post irovided with a binding screw .26 aiu secured in a recess in thc outer face of insulating block 18 by means of the screw 3() which secures spare bar $20 to said block, said screw $30 also serving to attach to the inner face of said block a contact plate .Z'i'. Q8 denotes a second binding post provided with a binding screw 2t) aud secured in a recess in the outer face of insulating block 19 by means of the screw 34 which secures s )ace bar 2l to said block. Screw 3l, by whieli space bar 21 is secured to insulating block 18, also secures to the outer face of said block one end of a bridge piece 86. Said bridge piece is secured to said block 1S at. its opposite end by a bolt. SlT which also seein-es to the inner fare of said block a Contact plate i8 and u socket Pitt whose purpose will be presently ex ilai ied. 'ilic inner face of insulating bloc( 1i is formed with inclined or ratchety projections 40, herein shown as four in number, the rontact platesI QT and 38 resting upon the faces of opposite. projections At0. liinding post 25, to which one of the line wires is attached, coninninicates through the serew 2&0 with contact plate Q7. Binding post 2S, to which the other line wire is attached, communientes through screw t-t, space bar 91, screw 3l, bridge piece liti, and l'iolt 37 with contact plate 38. rl`he circuit through contact. plates 27 and '38 is controlled by switeli mechanism which will nowI be described.

tl denotes a shaft having at'. one. end an angular head t2 normally held in an angular recess in insulating block ltl, the, opposite end of said shaft being mounted in a block ttl formed of suitable insulating material, such as fiber, said bloclc being slidably mounted in the socket. llt) and nornnillv held in the position shown in Fig. t bv ii spi-inv1r 44.

l,t5 tenotes a contact member loose on the l shaft 4l, the same. comprising a hub portion 46 (see Fig. 8) formed with angular recesses or notches Ati' and a pair of arms ttt eooperatiiig with the ratchet projections ltt).

49 denotes an operating segment. loosely mounted on the shaft 41 and formed of suitable insulating material, such as liber. At its outer edge segment 49 is provided with a curved flange 50 preferably comprising a' strip of sheet metal secured to said segment, as iv prongs 51 passinr through the material of said segment. o the u per end of tlange 50 is attached the inner em of operat ing chain 17.

52 denotes a disk secured to the segment 4t), as by means of prongs projecting there.- from, said disk having on its face adjacent the. contact member 45 a series of inclined or ratchet lugs 54 )referably stamped up from the material o said disk and coiiperating with the notches 47 in the Contact member 45. t

55 denotes a sprin f. secured at one eml tot the head lt2 and at tie other to the disk 52f said swing acting to hold the segment itil toward the contact. member 45 and also tot return the same to normal position after it has been turned upon the. shaft ll by a pulli upon the chain 17. i

The operationof the device is as followsd A downward pull upon the chain 1T causes' 'the se ment 4t) to be rocked upon the shat'ti t1 am, by enga vement of the lugs 54 on; the disk 52 with t ie notches 47 in the eontacttI member 45, causes said segment. to rotatej said Contact member and move its arms 48g from one pair ot ralf-hetprojeetions to on l insulatinw blot-lt lvtto the next, thereby earrj'ing .said arms intu or ont of eirLfagement, with contar-t. plates .ZT and ll and closing or bri-:thing thev eireuit. lluring this operation the arms t8 will ride up the. inclined ten-es ot the ratehet projections ItO, the sprin; r 55 permitting the parts to more longitudinallv of the shaft. -ll. llhen the arms yIH reach the, ends of said projections the. expansion of the. spring 55 will cause these arms to be engaged behind the shoulders formed by said projtx'tions. 'l`he oscillation ot the segnuut -1tl on the shat't tl caused by the downward pull ou the chain li' has "aused the spring 55 to be partly wound up, and when said chain is released the unwinding ot' the spring causes the segment. 49 to be returned to its initial position. During this movement. the eontaet member 45 will be held by engagement of its arms t8 with the shoulders at 'the ends of the ratchet. projections, and the lugs 54 on the dislc 59 will ride out of the notches 47 in the contact member l5 and will pass over the face of said member aml into the next adjacent notches. the spring 55 at this time yielding longtmlinallv to permit the 'necessary movement o the dislc 52 longitudinally olf the shaft dl.

yShould it be desired to adjust the spring 55, a screw driver or similar implement muv be inserted through an opening 5G in insiilating bloelc ttl and into engagement. with u slot 57 in the head 42, and the shaft moved 'l longitudinally against the tension of the 'i sprin(T 44 to carry the head 4f?. out of the angular portion of the recess in which the same usually lies and into an annular porg tion 5S of said recess. The shaft 41 may spring 55, after which the spring 44 will return the. head 42 into its angular recess and hold the. parts in adjusted position.

llaving thus described my invention, I4 claim:

1. The.combination with a shell having a centrally arranged chain guide at one end thereof, of a pair of spaced insulating blocks arranged longitudinallyy of said shell, ,switch mechanism between said blocks. and tlips extending inwardly from said shell bctween said blocks. and engaging the opposite l faces thereof.

, 2. In a device of the. character described, lthe combination with a shell having a eeu- `trally arranged chain guide at. one end i thereof and an insulating lining within said lshell, of a pair of spaced insulatingl blocks :arranged longitudinally of said Shel one of :said blocks having a ecess in its outer face, la bridge )ieee in the circuit lying in said `recess and inclosed by said lining, switch mechanism mounted between said blocks..

i and an operating chain therefor which 1 passes through the chain guide.

ln testimony whereof l. atlix my signaturel 1 in presence of two witnesses. j LlNN B. ABBOTT. W itnesses: i A. \t. Woosnrn,v

S. W. ArnmrroN.

now be turned to adjust. the tension of the 

